RU2042848C1 - Method of operating internal combustion engine - Google Patents

Abstract

FIELD: engine engineering. SUBSTANCE: air-oil mixture, which is collected in above-piston space 2 of disconnected cylinder 3, is discharged through drain valve 4 when piston 5 approaches the top dead center. Air is then separated from oil and directed to the atmosphere through flow meter 8, the oil being directed to crankcase 10 of the engine through oil pickup 9. When the piston in the disconnected cylinder moves from the top dead center, a portion of air is fed to above piston space 2 through flow meter 8 and drain valve 4, the portion being equal to the amount of air separated from the oil. EFFECT: decreased oil emission in exhaust manifold. 1 dwg

Description

 The invention relates to engine building, in particular to internal combustion engines that have been idling for a long time.

 A known method of operation of an internal combustion engine, which consists in turning off part of the cylinders in idle mode by cutting off the fuel supply and closing the gas distribution valves, compressing and expanding the mixture of air and oil in the disconnected cylinders.

 The disadvantage of this method is the increased consumption of oil entering the gap between the piston and the cylinder liner.

 The aim of the invention is to reduce oil consumption.

 To do this, in the method of operation of the internal combustion engine, which consists in turning off part of the cylinders in idle mode by cutting off the fuel supply and closing the gas distribution valves, compressing and expanding the mixture of air and oil in the shut off cylinders, before turning off the shut off cylinders into operation when each piston of the shut off cylinder approaches to the top dead center, the mixture of air and oil is released from the supra-piston cavity of the disconnected cylinder through the drain valve, air is separated from the oil, and the number is measured honors the separated oil from the air, and the motion of each piston cylinder disconnected from the upper dead point is carried out over the cavity above the piston of air cylinder disconnected portions equal to the number of the separated air from oil.

 The drawing shows a device for implementing the method.

 The device comprises valves 1 for gas distribution of an internal combustion engine, a piston cavity 2, a cylinder 3 for switching off an internal combustion engine. A drain valve 4 and a piston 5 are installed in the cylinder 3. The drain valve 4 is in communication with the oil separator 6 and through the channel 7 with a flow meter 8. Oil from the oil separator 6 enters through the oil sensor 9 into the crankcase 10 of the engine.

 The method of operation of the internal combustion engine is to turn off part of the cylinders in idle mode by cutting off the fuel supply and closing the gas distribution valves 1, compressing and expanding the mixture of air and oil in the disconnected cylinders.

 The method of work also consists in discharging the mixture of air and oil from the supra-piston cavity 2 of the disconnected cylinder 3 through the drain valve 4 when the piston 5 of the disconnected cylinder approaches the top dead center.

 The method of operation involves the separation of air from oil in the oil separator 6 and the air direction by channel 7 through a flow sensor 8 into the atmosphere. When this oil from the oil separator 6 is discharged through the oil sensor 9 into the crankcase 10 of the internal combustion engine.

 The method also provides for the movement of each piston of the disconnected cylinder from the top dead center feed through the flow sensor 8 and channel 11 into the supra-piston cavity 2 of the disconnected cylinder of a portion of air equal to the amount of air separated from the oil.

 The method of operation of the internal combustion engine is implemented as follows.

 After turning off the fuel supply, part of the cylinders stop gas exchange by closing the valve 1 of the gas distribution of each disabled cylinder. After several cycles, the amount of air in the closed volume of the cylinder decreases. The pressure of the end of compression decreases to 0.2-0.3 MPa, and the pressure of the end of expansion to a vacuum of 95-94%. At this point, oil is sucked into the supra-piston cavity 2 through the sealing rings of the piston 5, gradually accumulating, compressing and expanding the mixture of air and oil .

 Before turning the disconnected cylinder 3 into operation in order to avoid the accumulation of accumulated oil in the exhaust manifold, after turning on the gas distribution valves 1, a drain valve 4 is connected to the supra-piston cavity 2.

 When the piston 5 of the disconnected cylinder 3 approaches the top dead center and there is pressure in the cavity 2, the mixture of air and oil is discharged from the cavity 2 of the disconnected cylinder through the drain valve 4 to the oil separator 6. Next, the air is directed by channel 7 through the flow sensor 8 into the atmosphere, and the oil merges through the oil sensor 9 into the crankcase 10 of the engine.

 The meter is the amount of air discharged from the cylinder when the piston moves to top dead center, it is necessary for the following reasons. For one opening of the drain valve 4, it is impossible to release all the oil accumulated in the supra-piston cavity 2 through a small diameter hole. Therefore, to clean the cavity 2 from accumulated oil, several similar steps must be performed. And in order for these repeated actions to be completely identical, it is necessary, when the piston 5 moves from the top dead center, to let in a portion of air quantitatively equal to the released air into the supra-piston cavity. This is necessary to maintain a constant mass of air in the cylinder, to provide a compression pressure in the region of top dead center in the range of 0.2-0.3 MPa and to prevent rarefaction in the cylinder of more than 95%. If you do not perform actions to inlet air into the cylinder, then increased vacuum will result to increase oil suction through piston rings.

 When the piston 5 of the disconnected cylinder moves from the top dead center, a portion of air equal to the amount of air separated from the oil is supplied to the supra-piston cavity 2 of the disconnected cylinder.

 A portion of air is admitted through the flow sensor 8, channel 11 drain valve 4.

 The removal of the air-oil mixture from the cylinder will continue until oil enters the crankcase 10 through the oil sensor 9. When the oil flow runs out, the sensor 9 turns off the drain valve 4 and sends a signal to turn on the gas distribution valves and the fuel supply of the disconnected cylinders.

Claims (1)

 METHOD FOR WORKING THE INTERNAL COMBUSTION ENGINE, which consists in shutting off part of the cylinders in idle mode by cutting off the fuel supply and closing the gas distribution valves, compressing and expanding the air-oil mixture in the shut-off cylinders, characterized in that before turning the shut-off cylinders into operation when each piston is turned off the cylinder to the top dead center, the mixture of air and oil is released from the supra-piston cavity of the disconnected cylinder through the drain valve, air is separated from the oil and ryayut amount of air separated from the oil, and the motion of each piston cylinder disconnected from the upper dead point is carried out over the cavity above the piston of air cylinder disconnected portions equal to the number of the separated air from oil.